What happened
Meta's new AI assistant app, Muse, has climbed to the No. 2 spot on the US App Store's Top Charts. Launched on Tuesday, September 8, 2026, the app had been downloaded more than 83,000 times on iOS in the United States as of September 10, according to Sensor Tower data cited by TechCrunch — up from No. 4 just a day earlier.
Muse is currently limited to the US market and is positioned by Meta as a 'secure, private personal AI agent' that proactively helps people meet goals. It is available on iOS, Android, the web at muse.ai, and through WhatsApp, though web and WhatsApp use are not counted in download estimates.
Muse is one of Meta's bigger bets that agentic AI — AI that completes tasks on your behalf rather than just answering questions — is the future of consumer AI. It enters a crowded field: Google's Gemini Spark, Anthropic's Claude Cowork, and the SMS-based agent Instinct, which recently raised $350 million at a $2.5 billion valuation, are all competing for the same users.
Still, the launch is slower than Meta's past debuts. Threads drew over 4.3 million US downloads on launch day, and the Meta AI app saw 108,000 in its debut. Compared with ChatGPT's app, which topped half a million US installs in under six days, Muse took roughly twice as long to reach a comparable total. The Android app is faring worse, ranking only No. 338 in the Productivity category on Google P
There is also a trust question. Muse asks users to share more personal information with Meta, and it launched only days after Meta agreed to an $18 billion multistate settlement with 29 states over social media harms to children. Meta's privacy history includes the Cambridge Analytica scandal and a record $5 billion FTC settlement in 2019. Investors, however, appear optimistic — MarketWatch report
Muse's fast rise to No. 2 in the US shows real demand for AI agents, but how many people keep using it — and how much personal data they're comfortable handing Meta — will decide whether it's a genuine rival to ChatGPT or just a strong first week.
What is confirmed
Facts corroborated by the sources listed below.
Why it matters for me
Meta's new AI assistant app, Muse, has climbed to the No. 2 spot on the US App Store's Top Charts. Launched on Tuesday, September 8, 2026, the app had been downloaded more than 83,000 times on iOS in the United States as of September 10, according to Sensor Tower data cited by TechCrunch — up from No. 4 just a day earlier.
Just Worth Knowing
General Public
Meta’s AI agent Muse is now the No. 2 app in the US